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In this scheme, PICF based on higher order statistics is firstly extracted in the reduced space for effective representation of face images, and a PICF-based similarity measurement is proposed in the face image retrieval stage to ensure the efficiency of computation and the accuracy of retrieval and to eliminate the ambiguity in the order of independent features.

为确保计算有效性和检索正确率，在图像检索阶段提出一种基于PICF方法的相似性测度，可消除独立特征顺序的不确定性。

Firstly, DWT is applied to the image, and moment invariants is extracted on fixed-size blocks of low-frequency component in wavelet sub-band to yield a reduced dimension representation.

然而，许多实际情况是要求在不依赖任何预签名提取或预嵌入信息的前提下，对图像的真伪和来源进行鉴别，这就是图像盲取证技术，也叫被动取证技术，它是一种新的图像鉴别分析思路。

On the basis of shock wave characteristic of the supersonic projectile and the detailed analysis of measured datas,a method of decomposing and reconstructing the trajectory shock wave signal and muzzle blast wave signal is proposed and the characteristic parameters for positioning sound source and calculating trajectory vector with regular tetrahedron detection array are extracted.

根据空气动力学原理，在阐述超音速弹丸的弹道波特性的基础上，通过详细分析实测的声信号，提出了弹道波信号和枪口冲击波信号的小波分解和重构方法，提取了利用正四面体探测基阵进行声源定位和弹道矢量计算的特征参数，获得了满意的实验结果。

We extracted membrane protein of Mycoplasma hyopneumoniae MY-99 strain from its different passages strains MY-99l,MY-993 and rejuvenescence strain MY-992, then analyzed them by SDS-PAGE, the results show that the membrane protein of Mycoplasma hyopneumoniae MY-99 strain mutated during artificial culturing . According to the electrophoretic profiles, the membrane proteins of MY-991 include 7 protein bands: 94.4KD,57.5KD,46.0KD,36.0KD,32.4KD,20.4KD and 16.6KD.

采用0.4％TritonX-100结合KI提取猪肿炎支原体MY-99株不同代次的传代株MY-991、MY-993和复壮株MY-992的膜蛋白，并通过SDS-PAGE技术对其膜蛋白进行比较分析发现，在人工培养条件下猪肺炎支原体MY-99株的膜蛋白发生了一定的变异，其中MY-991株的膜蛋白有七条蛋白条带：94.4KD、57.5KD、46.0KD、36.0KD、32.4KD、20.4KD和16.6KD，MY-993株的膜蛋白有七条蛋白条带：94.4KD、57.5KD、46.0KD、41.0KD、36.0KD、32.4KD和19.5KD，MY-992株的膜蛋白只有两条蛋白条带：46.0KD和32.4KD。

Containing the Visible Region positioning and the Sequence Region positioning raised in this paper as well as the Orientation Region positioning raised by Levitt [17] , the qualitative positioning method segments the environment of robot into different equivalent classes , and describes the positions without coordinates but just using landmarks and landmark relations, based on the extracted qualitative relations from images such as the visibility of landmarks, the sequence of landmarks and the position relative to the landmark pair boundary .

定性定位包括本文首次提出的可见区域定位和顺序区域定位，以及Levitt[17]提出的有向区域定位，利用通过图像获取的路标的定性关系如路标的可见性，路标排列的顺序和相对于路标对边界的位置等，将机器人的运动环境划分为若干个等价类；其定性性体现在不必使用坐标就可描述机器人的位置，这种定位方法只利用视觉反馈中的定性信息。

The phase-averaged waveforms of residual' pulsant Reynolds stress term of coherent structures and Reynolds stress contribution term of random fluctuation during coherent structures burst process were extracted by conditional sampling and phase- average technique.

用条件采样和相位平均技术提取了相干结构碎发过程中相干结构剩余脉动雷诺应力和随机脉动对相干结构贡献的雷诺应力的条件相位平均波形。

Study on Improvement of Recovery of Gold and Silver from the Copper Dross Smelting in Reverberatory Furnace;2. After that, the copper in leach liquor can be extracted with the ternary extractant mainly containing P204, and the gold and silver in leach residue can be recovered by a process of cyanidation-replacement of Z.

为避免硫酸烧渣对环境的污染，以硫酸烧渣为原料，通过添加活性还原剂，用废硫酸直接还原浸出铁并制铁黄，而后用以P2 0 4为主体的三元萃取剂萃取回收浸液中的铜，用全泥氰化和锌粉置换工艺从浸渣中提取金银，较经济有效地回收利用了烧渣中的有价金属，铁、铜和金的回收率分别达到了 93。

Rutin was extracted and refined from Sophora japonica L. And rhamnose was prepared by the hydrolysis of kaempferitrin and rutin.

从槐米中提取并精制芦丁，并对所得的山柰苷及芦丁分别进行水解，制备得到了鼠李糖。

High purity and quality DNA extracted from Rhododendron was used for RAPD analysis.

采用改良的CTAB法提取杜鹃花的基因组DNA，所得的DNA纯度高、质量好，可用于RAPD分析。

Under a general anaesthetic 18 , doctors extracted bone marrow cells from Rhys and froze them.

在被麻药全身麻醉的状态中，医生们从里斯的身体里抽出骨髓细胞并把它们冰冻起来。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失